<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form action="test1">
<input type="submit" value="clik to see Filter1 effect" name="submit">
</form>
<form action="test2">
<input type="submit" value="clik to see Filter2 effect" name="submit">
</form>
</body>
</html>